I'm trying to create a model with serrations similar to those in the attached images but I have not been able to do it. Note that the serrations are radial - that is my downfall.
How can this be done?
tia
Kevin
[SOLVED] Need help creating serations
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[SOLVED] Need help creating serations
- Attachments
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- Screenshot_20210618_095124.png (62.62 KiB) Viewed 750 times
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- Screenshot_20210618_094854.png (27.42 KiB) Viewed 750 times
Last edited by gone_bush on Fri Jun 18, 2021 7:59 am, edited 1 time in total.
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Re: Need help creating serations
Cut one groove then https://wiki.freecadweb.org/PartDesign_PolarPattern
Re: Need help creating serations
OK, but I've got a mental block on how to draw the first groove. I can do it if it's straight bit not radially.
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Re: Need help creating serations
I made two nested polygons and lofted a triangle between two corresponding faces, then did a polar pattern. To make the edges circular, I pocketed them. I've no doubt there's a better way - I'm still a neophyte.
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- radialpattern.FCStd
- (221.19 KiB) Downloaded 16 times
Re: Need help creating serations
I remember at least two other discussions on this topic; you may search for Hirth joint.
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- papyblaise
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Re: Need help creating serations
one more idée
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- rachet.FCStd
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- rachet.PNG (14.4 KiB) Viewed 644 times
Re: Need help creating serations
Hirth joint - never heard of it before but that is exactly what I need.
For the record, I found this video that explains it very well: https://youtu.be/SEnCLU8moN4
Thanks for you help, much appreciated!
Re: [SOLVED] Need help creating serations
hi
How to make a hirth joint?
Work project is kicking my butt
Hirth joint (macro)
Repeating pattern on a cylinder (macro)
mario
How to make a hirth joint?
Work project is kicking my butt
Hirth joint (macro)
Repeating pattern on a cylinder (macro)
mario
Maybe you need a special feature, go into Macros_recipes and Code_snippets, Topological_data_scripting.
My macros on Gist.github here complete macros Wiki and forum.
My macros on Gist.github here complete macros Wiki and forum.